Is there much of a difference between the celestron and haader? 6mm Kellner eyepiece that I enjoyed a lot. Every review suggests replacing the 10mm Kellner eyepiece (and possibly 25mm Kellner) that comes with it. Be aware of the focal ratio of your scope. Put the zoom on the Barlow for the high range. Or we say that F10 would be easier or less demanding on the eyepiece than the F5. Omni 32mm Eyepiece - 1.25" Learn More. If you cant use 2, that 32 mm Plossl, which has a 50 degree AFOV, will give you about as wide a field of view as you can get in a 1.25 eyepiece. When discussing eyepieces, you will hear people comment on how well the eyepiece is corrected. You might be able to find a Kellner, or perhaps a high-quality Orthoscopic. Orion Sirius Plossl eyepieces are ideal for any type of telescope; refractor, reflector, or catadioptic. If you were considering a Meade Super Plossl, in that case just get the regular one also by Meade. 6.5-ish mm (100x & 200x) And of course, NEVER look through a telescope pointed at the sun that does not have a safe solar filter covering the front. You can do the calculation which will show that the 70 will have a significantly wider field of view as compared to the 52. The combination of high-quality optics and accessible prices have made them the favorite design for amateur astronomers and even professionals. I think some of these kits even include 4mm eyepieces, and thats ridiculous! https://www.widescreen-centre.co.uk/explore-scientific-70-eyepieces.html. All are good eyepieces and diagonals, and would be excellent for star party use. It's one of the best choices you have when it comes to budget stargazing. Hi Ed, PayPal, cash, bank transfer are all acceptable. The quality of a Plossl eyepiece completely depends on the brand and model, so be very careful in our selection. I would recommend the Baader Hyperion Zoom for any telescope. As a kid, I loved looking at the moon (which can be seen any time of day, regardless of ones bedtime) so make sure that the field of view is wide enough to see the whole shebang. With modern multi-coated optics that thwart internal reflections, Plossls and Kellners have little difference in glare or transmission/opacity. Some will offer longer eye relief which can be important to eyeglass wearers. https://telescopicwatch.com/celestron-starsense-explorer-dx-102-130-reviewed/, If I was to upgrade these lenses, I was planning on working toward something like this: https://www.amazon.com/Orion-8879-1-25-Inch-Enhanced-Telescope/dp/B000BMPBLK/ref=sr_1_8?crid=3KKUJRXYYN7DI&dchild=1&keywords=telescope+diagonal+1.25&qid=1610887695&sprefix=telescope+diagonal%2Caps%2C512&sr=8-8, Excellent article and very good recommendations. The way a Plossl eyepiece works is by using the convex lens and concave lenses to create an image that has both total magnification of what youre viewing, as well as erect images. Because some objects look better at low power, some at medium power, some at high power, and some at very high power. Sooooo helpful! Or take one of your eyepieces and measure across the bottom of the barrel. The Plossl is a good all-around eyepiece design, is well suited for generic use and is relatively inexpensive to make. No price limit. The 66-degree AFOV of the Gold Line series provides a 32% wider field than Plossl eyepieces. Typically a Barlow does not add or subtract from this, but there again we have bad Barlows and Good Barlows. Stargazing Help is a participant in Amazon Associates program. What follows are specific eyepieces that I have tried, own, or have read so many good reports about that I feel very comfortable recommending them. Plossl eyepieces have a wide FOV and are known for their clarity and sharpness. Kellner eyepieces were first designed by Carl Kellner in 1849. Was compairing the Apertura standard 15mm Plossl with their 15mm super wide angle eyepiece (70 afov). philhas Members 61 459 Location: North East England the reality is that today's eyepieces are all quite good, particulalarly in an f/10 telescope. Again, this is more noticeable in lower focal ratio scopes. The BHZ in a 2X Barlow will take an XT8 to 300X. Can you suggest the total . https://www.amazon.com/Orion-8829-Wide-Field-Telescope-Eyepiece/dp/B000M89H7C/ref=sr_1_2?dchild=1&keywords=Orion+Q70&qid=1606584502&sr=8-2, The Explore Scientific 68 degree series would be better but at a much higher price. To estimate the highest practical magnification for your telescope, you take the aperture in millimeters, mm, and multiply it by two. There are three types of Plossl eyepiece: the regular, Super, and Orthoscopic. short answer: yes. A Plossl eyepiece has a lens thats plano-convex, which means it is flat on one side and convex on the other. The price ranges we show here are the typical prices. I use some plssl eyepieces, since I still have quite a few in my kit, and yes, the others are correct. the shorter the focal length eyepiece = the shorter the eye relief. The Plossl eyepiece is a type of optical system that was invented by Ernst Abbe. Plossl eyepieces have wider fields of view than Kellners. Note that the Explore Scientific 68 and 82 degree eyepieces are also available in 2 size for your low power wide view requirements. Or, if you are buying from an online like Amazon, then look at the eyepieces I recommend and see if any suit your needs. If you feel the need to buy something now, consider this Orion diagonal. However, i can read very well without my glasses with almost microscopic vision and can use my binoculars without glasses. OK that makes sense, many thanks. Plossl eyepieces have an eye relief equal to about 80% of their focal length. If you plan to go longer than that you can get an AC adapter or a power tank. Yes, the wider field of view of a Plossl is very helpful, but 40 degrees of Kellners isnt a soda straw (unless you are used to looking through very wide field eyepiece. Even if we were next-door neighbors this would take weeks of discussion and planning. These are exceptional eyepieces, and only available on the used market nowadays. If you want a very good eyepiece with a bit wider field of view but are on a budget, these are very good choices. Thanks for a very helpful guide. FOR SALE! There is always more to learn but it helps if you go in with a good base understanding, and that was my goal. Many compare these favorably to eyepieces that are much higher priced. This Super Plossl design was better than regular Plossl eyepieces, but not by much. So your 600 mm example (f/6) becomes, in effect, an 1800 mm focal length, f/18 but it does not change the focal length of the eyepiece. How do you focus - I would have expected helical focusers in the eyepiece holders but don't see any? A standard Plossl eyepiece is typically between 20mm to 25mm but can range anywhere from 15mm up to about 40mm in diameter. My Meade 4000 56 and 60 degree Meade Plossls are pretty sharp to my eyes and do pretty well for me. The tradeoff was that each lens surface added another internal reflection, reducing contrast and adding glare. Even big telescopes are subject to limitations imposed by the atmosphere. I dont know if they make anything like this anymore, but as a kid, I had plastic slides with images on them (the Milky Way, Horse Head Nebula, etc.) Because the eyepiece was still similar enough to a Plossl and still kept the symmetrical design, they called it Super Plossl. We will now discuss the specifications of eye relief and apparent field of view. Outstanding job Jack. Plssl's were top of the line at one time, and are still being sold today, so that says something too. What should one opt for a 2 EP over a 1.25? The Plossl eyepiece is a four-element design consisting of two doublets. When you use a Barlow lens with an eyepiece, you get the magnification, but the eye relief is not affected. It's no surprise that the eyepieces in our Sirius Plossl line are our best-selling telescope eyepieces. Plssl eyepieces are affordable and they're outstanding additions to amateur telescopes. Their 50 to 52 degree AFOV is wide enough for general observing. I took notes and now can shop with confidence . And you don't even have to get the full set if you don't want to. As said, they are cheap to compare. thanks Ed. 2. 100-300X, 2X Barlow. 8.8 = 240 = .34 Just search on Astronomy Club and you will probably find one in your area. It will also make your life easier if youre out observing on windy days that would otherwise blow off the front cover of your telescope. These are considered to be the least expensive eyepieces for serious astronomy and are offered in focal lengths from about 6mm to 40mm. Below 20 however, the eye relief makes it difficult for me and my glasses so Ive been replacing my 5-15 EPs with 82 degree EPs with more relief. One last thing, as a kid I used my telescope to watch squirrels and birds (which was interesting because the image was flipped around :-) so, you might consider getting an eyepiece that flips things the right way around so that navigating terrestrial nature is easier to manage. I think you will love it! In the 1990s Meade instruments came up with a new design for the Meade 4000 line similar to Plossl that added a fifth glass element on top of the two pairs (4 total). Features : 5 superior-grade Plossl eyepieces: 1.25-in, 4-element design with a 52 AFOV (32mm has 44)4mm, 6mm, 9mm, 15mm, and 32mm . Plssl eyepieces are good all-around performers, producing sharp images at the center of the field, but they have only four lens elements. . Lets look at the minimum. Orion Sirius Plossl 1.25" eyepieces are ideal for all types of telescopes: reflector, refractor, and catadioptrics such as Maksutov-Cassegrains. When a beginner is choosing eyepieces on a budget, there are a number of possible designs they may choose between. Even if the scope comes with the more acceptable Kelner or . In my opinion, you do not. So speaking of the Barlow as if it modifies the FL of the eyepiece, while technically not correct, does provide an easier model to understand the net effect. We will use 10 mm as the eyepiece focal length, but we will look at three different 10 mm eyepieces, each with a different apparent field of view, AFOV. With your glasses on, you simply cant get your eye close enough to an eyepiece that only has 10 mm of eye relief. Or, you can have three properly sized eyepieces and use a Barlow lens to achieve three more magnifications, which is usually a less expensive way to go. At this point, a Plossl and a Kellner are so close in price and performance that you may as well get the Plossl. As long as you take good care of them, Plossls can last you a lifetime, and you will be able to use them with your next telescope if you upgrade at some point. You noted eye relief is important for those wearing glasses. This can be especially helpful in telescopes of focal ratios below F8. The Orthoscopic Plossl eyepiece is for those who are interested in performing close-up work on specimens up to three inches away from them and still get high magnification. So, even if you have a Maksutov-Cassegrain scope, you should get a good experience from this eyepiece. In that respect, they are similar to the Explore Scientific 82 degree mentioned earlier. So you ended up with: I am a BIG fan of zoom eyepieces, especially if you dont have many. Great article on eyepieces but I am still undecided exactly what eyepiece & Barlow to buy and from where since some buying sites dont provide all the info you cite in your article. You can accomplish a longer eye relief by barlowing a longer f/l plossl, so that is something to think about as well. In general terms, the higher the AFOV number, the more the eyepiece will cost. I really enjoy usingPlssls. There is no problem using a Celestron eyepiece in a Meade telescope, for example. A Barlow lens will not reduce the CA in a low FR achromat refractor so to speak of it changing the focal ratio would, I think, introduce confusion in most situations. short answer: yes. Plossls cost a bit more than the Kellners as Plossls are expensive to manufacture because they require good optical glass and precisely matched concave and convex doublet surfaces to prevent internal reflections. I am not aware of an ES branded 70 degree series in the USA, but they do have a Bresser branded 70-degree series. In stargazing, eyepieces are as important as telescopes are. I am considering buying another eyepiece, maybe 6mm, and a Barlow, maybe 2x, to give me a wider and higher range of magnification. 3. For super Plossl eyepiece, the field of view is typically 40 to 60 degrees. The sharp/crisp view you get from your 40mm Plossl comes down to the relatively low magnification it provides. These tend to run toward the more expensive price range. Do you need to have the best to enjoy astronomy? That's how cost-efficient the entire package is! If we look at the range I provided above, we see that we could replace several eyepieces with one zoom. Not everything in the sky benefits from high magnification. I purchased the Celestron Starsense 102mm refractor, focal length 660mm, stated highest useful magnification is 240x; it should arrive in about 2 weeks. However, the BH Zoom is by far my most used eyepiece. If you are looking at eyepieces that are wider than 55 degrees AFOV, you will again need to consider looking at the better corrected, and typically more expensive, eyepieces. No price limit? Im just starting out with astronomy and this really helped my understanding. On many occasions, that will be too high power for the atmospheric conditions. Later in the article, I will also give my top recommendations for both the best Kellner as well as the best Plossl eyepieces. This would definitely matter to observers who wear eyglasses when viewing. i didnt have all this simply-put information when i bought my orion st-80 as my christmas present to myself in 2020. i started out with several pair of binoculars i bought used off ebay, then bought the scope. I just ordered Hyperion 13mm and 21mm but I really like how sharp and crisp view is in plossl 40mm. Compared with a zoomable telescope eyepiece, they are pretty much the same in terms of the quality of the image. If the above guide has helped you understand the terms and workings of eyepieces, scroll up and make a selection from our recommendation list. I have the 38 mm and recommend it often. Plossl eyepieces are great. Even if you did need a 4mm focal length (for high powers in an f/4 telescope, of course), neither a Kellner nor a Plossl would have long enough eye relief for that to be comfortably usable! Plossl against Kellner eyepieces in a previous article, 5 Budget Telescopes That Are Sneakily Powerful. The Plossl design has become the mainstay of the modern ocular business and probably represents the best value in terms of performance and price, especially in medium and long focal lengths. To achieve six magnifications, you can have six eyepieces. Suggesting an F6 scope becomes an F18 would also imply things like reduced CA in a refractor. For example, if you put a 30 mm eyepiece in a 3X Barlow, it will triple the magnification you get from that eyepiece. The Regular Plossl eyepiece is made to be a basic type of scope for viewing objects that are nearbysay within two feet or so from where youre looking through it. Another really helpful article, Ed. Hi Ed, that is really helpful sorry if this is a daft question but is the baader hyperion 2 or 1.25 or can it be both? However, I have eyepieces with much smaller exit pupils and they work fine. Lets just say that once you get below F5, it is really hard for the eyepiece to deliver a clean image to the edge. (often referred to as Pseudo Masuyama). Worth is a subjective evaluation, so here is my subjective input: 1. Major telescope brands such as Celestron supplies Kellner eyepieces with their r least expensive telescopes and still may. ORION SIRIUS PLOSSL 10mm telescope eyepiece 1.25" - $17.01. The reason a plano-convex lens is good for using with a telescope is that it provides for both magnifying and erecting the images. But are they really? Since it's such a popular eyepiece and allows for quality, planet-viewing, that makes it a great instrument for attracting newcomers to the hobby, especially children. Of course, the entire eyepiece must be manufactured and finished correctly to realize the design's full potential. They have a narrow AFOV but have a reputation for being very sharp.. Can you help me. Both will provide the same magnification. This eye piece provides the maximum true field of view in the 1.25 inch format. The 4000 SWA's were way overpriced for their performance IMHO. You can still get eyepieces, but there are few choices. The 5-lens-element pseudo-Masuyamas that telesonic mentioned are/were fine eyepieces. To achieve these benefits, they may use special glass and more costly manufacturing. It was grueling, because I couldnt even get the entire field of viewI had to keep my eye hovering above the exit pupil. Stargazinghelp.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by linking to Amazon.com. You can buy a range of these from Modern Astronomy. They have good center sharpness but exhibit some field curvature and astigmatism. Thanks so much. I generally use my 40 to search for DSOs so Ill probably replace that one at some point too. A Plssl is probably as good as any 32mm eyepiece in a 1.25 inch focuser. I saw Jupiter today and its 4 moons but when I looked at saturn I struggled to get a really clear image and it was very small. You have to decide how fussy you are about the edges and what your budget can tolerate. Plus the FOV expands as you zoom to the higher powers. Generally, to maximize the number of stars you see in an eyepiece with a given telescope, both the magnification and field of view should be maximized.
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